UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,379
Default Central heating header tank - ground floor shut off to tank feed?

Have just installed the central heating header tank, in a little-
difficult-to-access loft, with a lever valve right next to the
ballcock as it should be.

I'm tempted to add a second lever valve in series with the first, in
the ground floor utility cupboard next to the hot water tank.

Should the header tank overflow ever start pouring (or any other part
of the system for that matter), it would make for a no-hassle shut-
off, until the ballcock/whatever can be replaced/repaired (as well as
making for easily controlled system filling).

However, there would always be the temptation for a future owner to
shut it off and forget about it.

So trading off convenience against a potential hazard - your thoughts?

The system actually uses a 250L thermal store, so vast amounts of
water would have to be lost before the tank/boiler (Rayburn 480K)
circuit could get air into it.

I'm also planning to have lever valves on the two tank-to-radiators
circuits to isolate them independently from the tank - but obviously
*not* on the boiler/tank circuit (apart from the valves either side of
the pumps).

Lowest point(s) in the system will be the 3 pumps (2 heating circuits,
1 boiler circuit - so it's "pump plan"), so this seems the obvious
place to add drain-off points. ISTR it's smart to raise the dop's
slightly wrt to the lowest point to prevent them sluding up. Same with
the pumps - have a *slightly* lower point for the sludge to collect?

I *think* there should be no need for air bleed valves, apart from
those in the rads - in normal use. But some extras might be useful for
system filling, and I can see that the dop's next to the pumps might
make for the easiest initial/partial system filling.

Comments/suggestions from those with similar systems or experience?
  #3   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,379
Default Central heating header tank - ground floor shut off to tank feed?


Just wondering why you're using a header tank in this day and age?


For a straightforward self-install. With a thermal store, there's no
real *disadvantage* to a vented system, unless it's a tankless combi
system chosen to save space in flats etc.

  #5   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 2,379
Default Central heating header tank - ground floor shut off to tank feed?


Ah. Don't think you mean a central heating header tank?


Sorry, feed and expansion tank. Header tank is so entrenched in me I
can't shake the term.


  #6   Report Post  
Posted to uk.d-i-y
external usenet poster
 
Posts: 173
Default Central heating header tank - ground floor shut off to tank feed?


wrote in message
...
Have just installed the central heating header tank, in a little-
difficult-to-access loft, with a lever valve right next to the
ballcock as it should be.

I'm tempted to add a second lever valve in series with the first, in
the ground floor utility cupboard next to the hot water tank.

Should the header tank overflow ever start pouring (or any other part
of the system for that matter), it would make for a no-hassle shut-
off, until the ballcock/whatever can be replaced/repaired (as well as
making for easily controlled system filling).

However, there would always be the temptation for a future owner to
shut it off and forget about it.

So trading off convenience against a potential hazard - your thoughts?


Do it.
There would be no hazard if it got turned of at some time. The worst that
would happen is that the F&E tank would dry up in a year or so and the
boiler would stop working.
This is a fairly common occurence when float valves get stuck in the closed
position and the boiler just cycles on its own stat when there is not enough
water to circulate round the system.

The system actually uses a 250L thermal store, so vast amounts of
water would have to be lost before the tank/boiler (Rayburn 480K)
circuit could get air into it.

I'm also planning to have lever valves on the two tank-to-radiators
circuits to isolate them independently from the tank - but obviously
*not* on the boiler/tank circuit (apart from the valves either side of
the pumps).

Lowest point(s) in the system will be the 3 pumps (2 heating circuits,
1 boiler circuit - so it's "pump plan"), so this seems the obvious
place to add drain-off points. ISTR it's smart to raise the dop's
slightly wrt to the lowest point to prevent them sluding up. Same with
the pumps - have a *slightly* lower point for the sludge to collect?

I *think* there should be no need for air bleed valves, apart from
those in the rads - in normal use. But some extras might be useful for
system filling, and I can see that the dop's next to the pumps might
make for the easiest initial/partial system filling.

Comments/suggestions from those with similar systems or experience?



Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Central heating header tank 4square UK diy 4 September 13th 09 02:42 PM
Central Heating Header Tank Culture TheScullster UK diy 2 February 26th 07 01:57 PM
Hot water tank not heating despite both feed and return from boiler/pump hot.... davem UK diy 6 November 27th 06 10:55 PM
Warm Central Heating Header Tank - Urgent(ish) TheScullster UK diy 3 October 10th 06 10:35 AM
Central Heating Header Tank. Geoff UK diy 6 December 2nd 05 12:10 PM


All times are GMT +1. The time now is 10:02 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"